R. Gamaliel said: three women may knead at the same time and bake in one oven, one after the other. But theSagesrule: three women may be engaged on dough at the same time, one kneading, another shaping and a third baking. R. Akiba said: not all women and not all kinds of wood and not all ovens are alike. This is the general principle: if it [the dough] rises, let her wet it with cold water.

Si`Ur must be burnt, while he who eats it is not culpable; sidduk must be burnt, while he who eats it [on Passover] is liable to Kareth. What is si`Ur? [when there are lines on the surface] like locusts` horns; sidduk is when the cracks have intermingled with each other: this is the view of R. Judah. But theSagesmaintain: regarding the one and the other, he who eats it is liable to Kareth. And what is si`Ur? When its surface is blanched, like [the face of] a man whose hair is standing [on end]